yes- hai
no- iie
please- dozo
thank you- arigato gozaimasu
thank you very much- domo arigato gozaimasu
your welcom- do itashimashite

Greetings

Good morning- ohayo gozaimasu
Good afternoon- konnichiwa
Good night- oyasumi nasai
good bye- sayonara
see you later- dewa mata nochihodo
how are you?- ogenki desu ka
Very well thanks, and how are you?- hai arigato gozaimasu. anata wa
fine- genki desu
excuse me- sumimasen
sorry!- gomennasai

Questions

where?- doko
How?- doyatte
When?- itsu
What?- nani
Why?- naze
Who?- dare
Which?- dochira
Where is?- ....wa doko desu ka
Where are?- ....wa doko desu ka
How far?- dorekurai no kyori desu ka

I'm...

i'm hungry- onaka ga suki mashita
i'm thirsty- nodo ga kawaki mashita
i'm tired- tsukare mashita
i'm lost- michi ni mayoi mashita
i'm fine- genki desu

It's...

big/small- okii/chisai
quick/slow- hayai/osoi
hot/cold- atsui/tsumetai
full/empty- ippai/kara
easy/diffucult- yasashii/muzukashii
heavy/light- omoi/karui
right/wrong- tadashii/machigai
old/new- furui/atarashii
old/young- toshitotteiru/wakai
next/last- tsugi no/saigo no
good/bad- yoi/warui
early/late- hayai/osoi
near/far- chikai/toi
here/there- koko/asoko